True/False
Indicate whether the sentence or statement is true
or false. If using scantron True = A, False = B
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1.
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Scaling shows us that--with growth--strength increases as much as size.
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2.
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If a
3 kg mass stretches a spring 5 cm, then a 6 kg mass will stretch the spring 10 cm.
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3.
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As
the volume of an object increases, its surface area also increases, but the ratio of surface area to
volume decreases.
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4.
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A 10
gram ice cube will cool a drink faster than 10 grams of crushed ice.
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5.
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Not
only does an elephant have more skin than a mouse, an elephant has more skin per body weight
than a mouse.
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6.
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A
beam or structure is under tension and compression even if it only holds its own
weight.
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7.
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According to the video, if glass was not able to flow, it would all shatter due to
resonance.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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8.
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Solids which have atoms arranged in regular geometric shape are A) | crystalline | C) | pseudocrystalline | B) | noncrystalline | D) | none of the other choices | | | | |
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9.
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If
something returns to its original shape after being bent, stretched, or compressed, it
is A) | tensile | B) | dense | C) | elastic | D) | inelastic | | | | | | | | |
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10.
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F ~
x or F ~ kx is A) | Boyle's Law | B) | Charles' Law | C) | Newton's Law | D) | Hooke's Law | | | | | | | | |
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11.
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If
you take a uniform piece of wood and cut it in half, the density A) | increases | B) | decreases | C) | stays the
same | D) | no way to
tell | | | | | | | | |
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12.
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A 2
kg mass stretches a spring 3 cm. How far does the spring stretch when it supports 6
kg? A) | 3
cm | B) | 6
cm | C) | 9
cm | D) | 12
cm | | | | | | | | |
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13.
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If
you squeeze a loaf of bread, the density A) | increases | B) | decreases | C) | stays the same | D) | no way to tell | | | | | | | | |
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14.
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What
is the heaviest atom found in nature? A) | lead | B) | gold | C) | mercury | D) | uranium | | | | | | | | |
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15.
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Which
has the greater density, A) | heavy bar of pure gold | C) | neither, they are the same | B) | pure gold
ring | D) | no way to
tell | | | | |
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16.
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If
you stretch or bend a material past its ___________________ , the material is permanently
deformed. A) | stretch
point | C) | bend
limit | B) | maximum tension point | D) | elastic limit | | | | |
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17.
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Which
of the following is/are inelastic? A) | steel | B) | rubber | C) | putty | D) | all of the
others | | | | | | | | |
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18.
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An
example of a beam shape used in building which is extremely strong but relatively
light-weight A) | rectangular | B) | spherical | C) | conical | D) | I-shaped | | | | | | | | |
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19.
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[Mass] Density refers to A) | an object's mass | B) | how much space
an object takes up | C) | how closely packed the atoms in an object are, or the object's
mass per unit of volume | D) | none of the other choices | | |
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20.
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If
the linear dimensions of an object are doubled (the length, width, and depth), how much does the
total surface area of one side increase? A) | double | C) | by 1.5 times | D) | by 4 times | E) | by 8 times | B) | triple | | | | | | | | |
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21.
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If
the linear dimensions of an object are doubled (the length, width, and depth), how much does the
total volume increase? A) | double | B) | triple | C) | by 4 times | D) | by 6 times | E) | by 8 times | | | | | | | | | | |
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22.
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Which
has more volume A) | a kilogram of
lead | C) | neither, they
have the same volume | B) | a kilogram of feathers | D) | no way to tell | | | | |
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23.
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Which
weighs more, A) | a kilogram of
lead | C) | neither, they
weigh the same | B) | a kilogram of feathers | D) | no way to tell | | | | |
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24.
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The
main objective in the bridge-building contest it to make the bridge A) | as strong as
possible | C) | as efficient as
possible | B) | as light as possible | D) | none of the other choices | | | | |
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25.
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Efficiency in structures, such as the bridge building, is the A) | total load held
plus bridge mass | C) | total load held
minus bridge mass | B) | total load held times bridge
mass | D) | total load held
divided by bridge mass | | | | |
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26.
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The
strongest static shape is the A) | square | B) | triangle | C) | circle | D) | hexagon | | | | | | | | |
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27.
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A
beam is sat on two supports. A weight is placed in the middle. Which layer(s) are under
tension? A) | top | B) | bottom | C) | middle | D) | all | | | | | | | | |
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28.
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The
bottom layer of a regular arch in any structure (such as a bridge) is
under A) | tension | C) | both tension and
compression | B) | compression | D) | neither tension nor compression | | | | |
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29.
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If a
force of 10 N stretches a certain spring 4 cm, how much stretch will occur for an applied force of 15
N?
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30.
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The
minimum bridge length, according to the rules, is A) | 20 cm | B) | 30 cm | C) | 50 cm | D) | 60 cm | | | | | | | | |
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31.
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How
are we able to see crystals or atomic patterns in many materials if they are not apparent to the
naked eye? A) | infra-red
photographs | C) | ultraviolet
photographs | B) | x-ray photographs | D) | gamma ray photographs | | | | |
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32.
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In a
compression or crash--such as in an Egg Drop Lander--the lander is most safe that is able to maximize
the ______________ of impact and minimize the _____________of impact. A) | force;
time | C) | change in
momentum; time | B) | time; force | D) | time; change in momentum | | | | |
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33.
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What
uses a larger proportion of its energy to keep warm? A) | a large
mammal | C) | neither--they
use the same proportion | B) | a small mammal | D) | no way to tell | | | | |
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34.
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If
you mix up a batch of cake batter and make cupcakes instead of a whole cake, and bake them for the
time suggested for baking a whole cake, what will be the result? A) | they will be
overcooked | C) | they will be
cooked perfectly | B) | they will be undercooked | D) | no way to tell without trying it | | | | |
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35.
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The
force causing material or structure to bend, twist, or shift A) | compressive | B) | shear | C) | tensile | D) | none of the
other | | | | | | | | |
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36.
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The
bridge type with a framework of triangles. A) | truss | B) | girder | C) | arch | D) | cantilever | | | | | | | | |
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37.
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The
structure that supports the end of a bridge, bears weight or pressure in an arch, or anchors cables
of a suspension bridge. A) | span | B) | shear | C) | abutment | D) | pier | | | | | | | | |
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38.
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The
supporting structure at the junction of connecting spans of a bridge. A) | arch | B) | abutment | C) | cantilever | D) | pier | | | | | | | | |
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39.
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The
type force when material is pulled apart. A) | compression | B) | tension | C) | shear | D) | none of the other | | | | | | | | |
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40.
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The
Tacoma Narrows Bridge fell apart due to A) | poor construction methods | C) | faulty materials | B) | wind, shearing
force, and resonance | D) | all of the
above | | | | |
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41.
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When
an object's natural vibration frequency is matched by another vibration, a tremendous increase in
amplitude occurs. This phenomenon is called A) | aolian harpism | B) | echo | C) | amplification | D) | resonance | | | | | | | | |
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42.
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If a
substance (such as oil, or glass) flows very slowly, it is very A) | solid | B) | viscous | C) | crystalline | D) | morpheus | | | | | | | | |
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43.
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Who
was the famous jazz and blues singer who was shown in the video breaking a wine glass with her
amplified voice? A) | Etta
James | B) | Ella
Fitzgerald | C) | Elephant
Gerald | D) | Josephine
Baker | | | | | | | | |
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44.
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A
sugar cube has a volume of 1 cm3. You stack a bunch of the sugar cubes together to
make a big cube that is 2 cm long by 2 cm wide by 2 cm deep. What is the new cross sectional
AREA (or the area of one side) and therefore the number of times the STRENGTH has
increased? What is the new volume (and therefore the number of times the WEIGHT has
increased)? A) | 2
cm2; 4 cm3 | B) | 4 cm2; 6
cm3 | C) | 2
cm2; 8 cm3 | D) | 4 cm2; 8
cm3 | | | | | | | | |
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Yes/No
Indicate whether you agree with the sentence or
statement. If using scantron, Yes = A, No = B
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45.
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Does
the mass of a loaf of bread change when you squeeze it?
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46.
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Does
the volume of a loaf of bread change when you squeeze it?
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47.
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Is a
steel beam slightly shorter when it stands vertically?
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48.
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In
real life, do engineers ever get to build the "best" structure possible, with no
limitations or restrictions?
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49.
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Is
the middle layer in a beam usually the most neutral (neither under compression nor
tension)?
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50.
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Based
on the concepts of scaling (surface-to-volume ratio), it makes sense that natives of the hot African
desert tend to be relatively tall and slender, and natives of the Arctic region tend to be short and
stout.
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